In this arrangement 30sec start from last acceleration - it is ok ?
I can do that later - 1.5 hour
I am back, drawing is coming soon
Not like that.You need another MOSFET for LED, Drain of second MOSFET connect to source of the first one, source to LED, gate to R2, make R2 bigger 1- 10k.Your LED is 2.1V so add one more in series with it.
The LED is not bright. I attached an ammeter from the LED to ground terminal and it was only drawing 20mA
Sorry, but I think ted needs to learn more about mosfets before posting diagrams like this.The circuit posted uses an N-channel mosfet (2N7000, BUK9520) as source follower.It means that source is always Vg(th) lower than the gate.I doubt that an NE555 (4.5volt minimum), and two LEDs in series, will run correctly on a ~2.5-3volt supply.If you want to power the NE555 high-side through a mosfet switch, you must use a p-channel fet (source to battery/VCC),with the switch and RC circuit swapped (switch between gate and ground, and RC between VCC and gate).The NE555 also needs some decoupling on it's supply pin.Leo..
The circuit is ok, AA battery will not last long, duracell battery are the strongest one, consider 18650 3.7 Volt Lithium Ion Battery, you need to check that, will this circuit work at lower voltage in practice, regardless what data sheet is telling.Do you have 30 sec ?